You are going to hear me say something that I rarely say. . .
listen to your friend.  Now, the C isn't that important. . . but as an
antioxident it is worth the investment. . . just make sure you stay away
from a corn-based source. . .and water. . . drink water. . .lots of water.
. . because it's good for you. . . as for giving blood. . . even if it's
wacked-out advice. . . it helps people. . . and can save a life. . . so
why not just do it?